Stereopticon.



Patented May 22, 1917.

2 SHEETSSHEET 1.

J/Ze under /Z- A. F. VICTOR.

STEREOPTICON.

APPLICATION FlLED EB. 26, 1914.

J xi NM NM A. F. VICTOR.

STEREOPTICON.

APPLICATION man FEB. 26. 1914.

LQQ'Y QOYW Patented May 22,1912. I

2 SHEETS-SHEET 2.

@mum llllllllllllllllll I ALEXANDER FERDINAND VICTOR, 0F DAVENPORT,IOWA, ASSIGNOR TO VICTOR ANIMATOGRAPH COMPANY, 015 DAVENPORT, IOWA, ACORPORATION OF IOWA.

STEREOPTICON.

Specification of Letters Patent.

Patented May 22, 1121?.

Application filed February 26, 1914. Serial No. 821,121.

To all whom it may concern:

Be it known that I, ALEXANDER FERDI- NAND VICTOR, a subject of the Kingof Sweden, having declared my intention of becoming a citizen of theUnited States, residing at Davenport, in the county of Scott and Stateof Iowa, have -invented new and useful Improvements in Stereopticons, ofwhich the following is a full, clear, and exact description.

My invention relates to improvements in stereopticons, and particularlyto stereopticons of the type set forth in Letters Patent of the UnitedStates, granted to me May 27 1913, Number 1,062,622.

The object of my invention is, principally, to so construct the samethat it can be reduced in size and made very compact without detractingfrom its value and efliciency as a high grade apparatus. secondarily, 1tis the object of my invention to support the entire apparatus ona-single standard; to so unite the slide-holder, condensing-lenses andprojecting lens that they can be separated as a unit from the rest ofthe apparatus without disturbing their relation, and it is also one ofthe objects of the invention to attach the means for supporting thecondensing lenses to the slide-holder and have it project back into thehousing so that it will not come in contact therewith so as to permitbetter ventilation; and it is another object to provide a tubularsupportfor the projecting lens, and to yieldingly attach said tubularsupport to the slide-holder so that it may be utilized to clamp theslide in any position to which it may be adjusted. These and otherobjects and advantages I accomplish by the means hereinafter fullydescribed and as particularly pointed out in the claims.

In the drawings:

Figure 1 is a longitudinal section of my improved stereopticon.

Fig. 2 is a transverse section taken on dotted line 22, of Fig. 1.

Fig. 3 is a rear end view ofthe said stereopticon with its base brokenaway.

Fig. 4: is a side view of the tubular support of the projecting lens,the slide-holder and support for the condensing lenses removed from theapparatus.

Fig. 5 is a detail view showing a fragment of the rear end of the casingof the stereopticon in section.

Fig. 6 is a transverse section taken on dotted. line 66, Fig. 1, lookingin the direction indicated by the drawings.

The base and standard A of my invention is substantially the same asthat illustrated and described in my aforesaid Letters Patent. Thesaddle a is also substantially the same, but a vertically disposedintegral circular frame B is supported by said saddle instead of apillow, as in said patented stereopticon. The forward edge of thiscircular frame B has an inwardly projecting circumferential flange C,and the inner circumference of this flange has a rabbeted seat 0 inwhich the edge of the annulus 9 of the slide-holder elements is seatedand secured by suitable screws, as will hereinafter more fully appear.

A cylindrical housing for the arc-lamp used in connection with myimprovements is built up back of and is supported by this circular frameB, which comprises an outer cylindrical sheet metal shell 2, the forwardend portion of which is secured concentrically to the innercircumference of frame B; the forward edge of this shell 2 beingrecessed to accommodate the presence of rectangular shaped lugs 3, 3,that are, preferably, about ninety degrees apart and project rearwardlyfrom flange C and are integral with the same and with said circularframe. The rear end of shell 2 is secured in the outer rabbeted edge ofa metal annulus 4. This housing also comprises an inner:

cylindrical shell 5 which is spaced apart from the outer shell 2 and hasits forward edge secured in rabbets in therear ends of lugs 3, 3, thusleaving an open space between said edge and flange C of thecircular-frame B. The rear edges of the inner shell are screws (notshown) that are tapped into the said annulus. This head 6 is of atruncated cone shape, and in the top of the inclined sides thereof Imake a red glass peep-hole 7. In the same horizontal plane as the centerof this head 6, diametricallylw opposite each other I makecarbon-holders flangeor bead 10 and secured in the rabbeted seat made toaccommodate the same to the inner circumference of frame 18 next theforward side thereof, by means of set-screws 12, 12. This slide-holderis provided with an inwardly projecting flange 13 next its forward sideand the forward edge of a circular condenser lens-holder or cradle issecured in. the annulus of said slide holder in a suitable manner andthe forward condenser lens 14 when seated in said cradle is confinedwithin frame B and bears against said flange 13.

The condensing lens holder or cradle consists of two circular frames orrims 15, 16,

in which the condensing lenses 14, 18, are.

seated. The rear rim 16 is angle-shaped in cross-section and isconnected to the flat rim of the forward lens 14 by a semi-cylindricalweb 19. The rims 15 and 16 and the web 19 are, preferably, made from onepiece of sheet metal. Web 19 connects the lower portions of said lenses,and it has a flat segmental spring 21 secured transversely to the innersurface thereof in such manner that its ends project above the upperedge of web 19, and, in their normal positions, bend inward within theperimeter of the lenses. In addition to this spring, T secure a pair ofsprings 20 to the inner surface of each side of web 19 that are of suchdimensions and are disposed and arranged in parallel position inside ofand alongside of spring 21, and bear against the margins of thecondensing lenses and confine them in proper position in theirrespective rims. The cradle holding the condensing lenses is separatedfrom the inner shell of the lamp-housing and there is always a.circulation of air through the series of openings 22 in the outershell, and 23 in the inner shell and between the fore-shortened forwardedges of the inner shell and the slide holders so as to reduce to aminimum the high temperature created by the burning of the carbons ofthe arc-lamp in the rear of the housing.

The annulus of the slide-holder has corresponding upper and lowerguide-lugs 24, 24, projecting forward therefrom. These lugs are placeddiametrically opposite each other and their opposing inner surfaces arehorizontal. The ordinary slide is inserted transversely in the machinebetween these lugs 24 and is clamped against the forward side of thesaid annulus 9, by the pressure of the rear annular frame 25 forming therear end of the tubular support of the projecting lens. This tubularsupport has a frustum shaped metal shell 26, which is greatest indiameter at its rear end, and its rear end is secured to the outercircumference of the annular frame 25, and its forward edges aresuitably secured to the outer 'circumference of an inside ring 27. Thisring 27 has a suitable flanged bushing 28 secured to and within thesame, and the inner circumference of this bushing is screwthreaded andadapted to be engaged by the outer screw-threaded rear end of a nipple29. The annular frame 25 and the ring 27 are connected by longitudinalbolts 30, which, when tightened up, securely hold said annular frame,ring and shell 26 in their assembled positions.

The projecting-lens holder 31 is of a conventional design, and T make noclaim to inventorship of the same. Suffice it to say that the rear endof this lens holder has a screw-threaded portion which is removablytapped into the forward end of the nipple 29.

The projecting lens holder is secured to the slide-holder by means ofscrews 32 which are tapped through suitable smoothly bored openings inthe annular frame 25, longitudinallyinto openings in lugs 24, 24. The

. headed ends of these screws 32 are provided with suitable washers, andbetween these washers'and the forward sides of said annular frame 25,coil expansion springs 33 surround the screws. These springs are ofsuflicient strength to press the annular frame against the forward endsof lugs 24 and to maintain the projecting lens and projectinglens-holderconcentric to the focal axis of the condensing-lenses, and the arc-lightin the rear of the housing. If the thickness of the slide-holder isgreaterthan the length of the lugs 24, the pressure of the rear end ofthe projecting lens support will be sufficient to hold it in anyposition to which it may be adjusted. If the slide holder is of suchwidth as to move too freely between the lugs 24, a set-screw, which istapped down through the upper lug 24, can be manipulated to retain theslide-holder in the position desired.

. The screws 12 that are used to secure the slide-holder in place aretapped through the flange C of the circular frame. B and into the lugs3, 3, thereof, situated above and below the axis of said frame, and theheads of these screws lapover the outer circumference of said circularframe and hold it in place while permitting it to be rotatable. Atsuitable points 12, located diametrically opposite each other, thecircumferential edge of the circular frame of the slide-holder isflattened, and by rotating the slide-holder on ltd mentor its axis untilthese flattened portions are next said screws 12, the slide-holder andparts supported thereby can be removed from the housing by withdrawingthe same longitudinally forward a suitable distance.

, Thisslide-holder, etc, can be inserted in place by the reversal ofthese movements. 'What I' claim as new is:

1. In a device of the class described, a-housing consisting ofconcentric inner and outer ing the rear end. of the housing, a lampsupported bythe tapering head,a frame having lugs secured to the forwardend of the hous ing for securing the frame and housing together, aslide-holder secured insaid frame, a cradle in the housing in the rearof the slide-holder, a pair of condensing lenses in said cradle, and aplurality of springs supported by the cradle and disposed relatively tothe-lenses. V

' '3. In a device of the .class described, a

housing consisting of concentric inner and.

outer perforated shells, a'tapering head closing the rear end of thehousing, a lamp supported by the tapering head, a frame having lugssecured to the forward end of the housing for securing the frame andhousing together, a slide holder: secured in said frame, a cradle in thehousing in the rear of the slide-holder, a pair of condensing lenses insaid cradle, and a plurality of springs supported by the cradle anddisposed relatively to the lenses; one of said springs being flat andothers being curved.

4. In a device of the class described, a housing'consisting ofconcentric inner and outer perforated shells, a tapering head closingthe rear end of the housing, a lamp supported by the tapering head, aframe having lugs secured to the forward end of the housing for securingthe frame and housing together, a slideholder secured in said frame,condensing lenses and a cradle for holding said lenses consisting offrames in which the lenses are seated, and a web connecting said frames.

5. fn a demos of the class descr bed, a housing conslstlng of concentr1cmner and outer perforated shells, a tapering head closing the rear endof the housing, a lamp supported by the tapering head, a frame havinglugs secured to the forward end of the housing for securing the frameand housing together, a slide-holder secured in said frame, condensinglenses and a cradle for holding said lenses consisting of frames inwhich the lenses are seated, a web connecting said frames, a separatingspring attached to the web, and curved lens supporting-springs alsoattached tothe web.

In witness whereof I have hereunto set my hand this 12th day ofFebruary, 1914. I ALEXANDER FERDINAND VICTOR. Witnesses:

'FRANK D. Tnomason,

1F nonnncn MITCHELL.

